Drill



L. D. KARNS April 13 192 6.

DRILL Filed Sept. 26,v 1921 2 Sheets-Sheet 1 K720672122 lam/rem eflwdlgyi wna L. D. KARNS April 13 ,-1926.

DRILL Filed Sept. 26 1921 2 Sheets-Sheet 2 lawr enceJMgf Wfzw Patented Apr. 13, 1926.

UNITED STATES PATENT OFFICE.

LAWRENCE DUDLEY KARNS, OF SALT LAKE CITY, UTAH, ASSIGNOR, BY MESNE AS- SIGN MEIITS, TO LAWRENCE MT ELL DRILL CQMPAN Y, A CORPORATIQN OF ARIZONA.

DRILL.

Application filed September 26, 1921. Serial No. 503,351.

To all whom it may concern:

Be it known that I, LAWRENCE DUDLnY KARNS, a citizen of the United States, residing at Salt Lake City, Utah, haveinvented a certain new and useful Drill, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to improvements in drills, particularly the bit portion thereof for use in drilling oil wells and the like.

The object of my invention is to provide a bit for use in drills of the shape and design which will prevent clogging and breakage with increased capacity for cutting through rock and other strata and with means for introducing water into the excavation if desired underpressure or without, for the purpose of removing the sediment and cuttings without the necessity for removing the drill. The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawings which illustrate the preferred and modified embodiment of my invention:

Fig. 1 is a front view in elevation of my invention.

Fig. 2 is' a side elevation of a portion of my invention. a

Fig. 3 is a front elevation of aportion of m invention from another view.

ig. 4 is a bottom view of the bit constituting the preferred form.

Fig. 5 is a bottom view of a modified form of bit.

Fig. 6 is a front elevation of a portion of a modified form of bit. 6

Fig. 7 is a side elevation of a modified form of a portion of my invention. -Fig. 8' is a bottom view of another modified form of my bit.

Fig. 9 is a front elevation of a second modified form of bit. a

Fig. 10 is a side elevation of my second modified form of bit.

--The preferred form of my invention is shown in Figs. 1 to 4 inclusive, of the drawings wherein 11 is the shank of the bit which is arranged at the upper end with any suitable connecting means at 12 for be ngconnected with the shafting of the drill either fixedl or removably. The bit at the lower end t iereof is provided with a plurality of notches 13 sharpened to a cutting edge and beveled so that the debris or cuttings are forced upwardly as the cutting proceeds.

At the. sides of the central cutting edge I have provided Wings 14 having the edges thereof notched and the notched portion sharpened and beveled. The central cutting edge 15 mayextend below the wings 14 so that it first contacts the rock or other hard substance so that it is cracked and broken before the wings 14 come into engagement for performing the main cutting and ream; mg operation, thus preventing breakage of the wings and facilitating the cutting.v

duced into the well alongside the shafting of the drill and introduces water into the well (under pressure if desired) so that all dbris and cuttings are forced out of the opening without the necessity for lifting and removing the drill.

the pipe is extended past the projection 17, the incline of said projection "thrusts the pipe to one side of the wing 14 until it rests upon the bottom of the well. This "llli be apparent to. the operator because the flow of water will appreciably diminish or cease. This is useful in operation, in gauging the position of the bit and water pipe and their relative position at the bottom of the well. The incline on the projection 17 is useful in preventing the pipe 16 from contacting with the wings 14 in a detrimental manner The shape of the projection 17 also permits the This pipe 16 nor- F 'mally rests above the projection 17; when easy 'dislodgment of the pipe 16 in the eventwell. The contour of the wings 14 with the I bevel of the cutting edges and the incline of the projection 17 synchronize 1n such a way With respect to the modified forms shown in Figs. 5 to 10 inclusive, these may be used where a more perfect reamer is desired, together with other similar. objects. The modified forms of bit are also somewhat cheaper to construct and easier to sharpen.

I do not wish to be limited in my invention to the specific structures shown and described, as numerous modifications within the scope of the appended claims may be made without departing from the spirit of my invention.

. What I ,claim is 1. Infa drill, the combination of a bit having a main cutting edge with a plurality of notches sharpened and beveled on both faces, wings on the opposite ends of said main cutting edge having a plurality of notches sharpened and beveled onone face, the main cutting edge extending a short distance below the cutting edges and notches of the wings, said cutting edges and notches of the wings receding from the main cutting edge.

2; In adrill, the combination of a bit having a main cutting edge with a plurality of notches sharpened and beveled on both faces,

Wings on the-opposite ends of said main cutting edge having a plurality of notches sharpened and beveled on one face, the main cutting edge extending a short distance below the cutting edges of the wings, lugs on opposite sides of the shank tapering upwardly anda conduit paralleling the shaft of the drill for introducing water into the opening.

3. In a drill, the combination of a bit having a main cutting edge with a plurality of notches sharpened and beveled on both faces,

wings on the oppositeends of said main cutting edge having a plurality of notches sharpenedand beveled on one face, the main cutting edge extending a short distance below the cutting edges of the wings, lugs on opposite sides of the shank tapering upwardly, a conduit paralleling the shaft of the drill for introducing water into the opening, the pipe and lugs being limited to lie within the circumference of the opening made by the cutting edges.

4. A tool of the character described, hav= ing an extended cutting edge formed with a plurality of notches having both faces beveled and sharpened and Winged cutting edges having their edges formed with a plurality of notches arranged in receding relation to the extended cutting edge and provided with the inner face sharpened and beveled substantially as -'shown and described.

beveled, peripheral wings on the main cut-- 7 ting edge having a plurality of notches sharpened and beveled as shown and described for reaming.

6. In a drill, the combination of a bit having a'main cutting edge with a plurality of notches sharpened and beveled, peripheral wings'on the main cutting edge having a plurality of notches sharpened and beveled for reaming, lugs on opposite sides of the shank tapering upwardly and a conduit paralleling the shaft of the drill for introducing water into the opening.

7 In a drill, the combination of a bit having a main cutting edge with a plurality of notches sharpened and beveled, peripheral wings on the main cutting edge having a plurality 'of notches sharpened and beveled, lugs on opposite sides of the shank.

tapering sharply upwardly so as to preventthe conduit from lodging thereon, a conduit paralleling thecshaft of the drill for introducing water into the opening, the pipe and,

their edges formed with a plurality of notches arranged at an angle to a plane normal to the axis of the tool and provided with the innerface sharpened and beveled substantially as shown and described. 1

9. A drill head of the class specified, affording a main cutting edge, peripheral auxiliary cutting edges, and upwardly widening passages therebetween to permit upward displacement of the detritus, the main cutting edge extending below theauxiliary cutting edges, and some of the cutting edges being sharpened and beveled.

10. In combination, a rock or well drill consisting of a main central cutting edge whose length corresponds to the diameter of the bore and two auxiliarycutting and reaming edges extendlng rearwardly from.

two or more auxiliary cutting and reaming portions in the form of segments of the circumference of the bore and providing therebetween and thecentral portions upwardly flaring passages for the upward displacement of the detritus.

12. In combination, a rock or well drill and reamer consisting of a main central tapering portion having a cutting edge whose length corresponds to the diameter of the bore and two or more auxiliary cutting and reaming portions spaced therefrom and having the form of segments of the circumference of the bore and providing therehetween and the central portion an upwardly widening passage for the'upward (lisplacement of the detritus, some of the cutting and reaming edges being notched and beveled.

13. In combination, a rock or well drill with reamer consisting of a main cutting portion having the edge extending diametrically of the drill, a plurality of reaming edges receding longitudinally from the ends of the main cutting edge and corresponding to segments of the circumference of the bore and an external conduit paralleling the shaft of the drill for introducing waterinto the hole and means for guiding the same.

In witness whereof. I hereunto subscribe my name to this specification.

LAVREN DUDLEY KARNS. 

